Tire removing machine



Sept. 22, 1931. a. VAN DAAM TIRE REMOVING MACHINE Filed Decu 2.

Patented Sept. 22, 1931 y t l I arr stares PATENT orrice GERRIT VAN DAAM, F KENMORE, NEW YORK TIRE REMOVING MACHINE Application filed December 2, 1929. Serial No. 411,150.

This invention relates to a machine for faable on their shanks and brought into clampcilitating the removal of tires from their suping relation with the rim as by means of the porting rims, and more particularly to the nuts 7 threaded onto'the shanks 6. removal of tires from rims having a fixed 'Mounted on the standard 1 beneath the ta- 5 diameter with a removable side ring. ble'is a bracket 8 having a jack supporting 55 The removal of a tire from this type of arm 9. for supporting the jack 10 in proxrim, especially after being in long and unimity to the periphery of the table 2, and a interrupted service, is a difficult operation second arm 11 which carries a mechanism for and frequently requires the expenditure of providing relative rotary movement between 10 considerable work and exertion on the part the jack and said table. In the preferr 60 of the individual making the tire change. embodiment this mechanism comprises a The present invention aims to provide a drive shaft 12 which may be power actuated, machine by which the removal of the tire is s by. means of a belt (not shown) taking greatly facilitated and may be expedi iously over a pulley 13, or manually actuated, as

accomplished with a minimum effort on the y met-1 Of :1- halld W ee FiXed vO11 the 65 part of the operator or workman. shaft 12 is a gear 15 having operative con- The invention further resides in the pronection with an annular rack 16 on the table, vision of a machine of this character which an interposed transmission 17 being provided will accommodate the various sized rims, and where desired.

also provide for substantially uniform re- 1 The jack 10 may be of any suitable charac- 70 moval f th gi f th i b t. it tcrand 1n the present illustration 1t hasbeen entire periphery. shown as being of the hydraulic type havmg The invention further resides in the salient a power Cylinder 18 the piston of which is features of construction and the arrangereciprocated by m-eans of an actuator 19 so ments and combinations of parts hereinafter as to extend the plunger rod 20 of the'work 7 more fully described and claimed, reference Cylinder vertically against the overlying tire being had to the accompanying drawings 4. The plunger rod 2-0 is herein illustrated wherein as supporting a tire engaging head 21, and Fig. 1 is a top plan view of the improved where desired this head may carry one or machine with portions broken away. morerollers 22 for rolling contact on the 80 Fig. 2 is a vertical sectional view t-hereof side wall of the tire casing. with parts left in elevation. The jack or applicator is manipulated to Fig. 3 is a detail view further illustrating exert upward pressure against the tire casing, the power applicator or jack. and by means of the table being revolved Referring more in detail to the accomthrough the mechanical movement 1217, 85 panying drawings, the numeral designates this upward pressure of the jack will be apa standard or support on the upper end of plied progressively to the tire about the pe which is mounted a table 2 preferably havriphery of the rim thereby gradually wedging a fixed diameter of a size for accommoing and shifting the tire upwardly, or laterdating the smallest sized rim. as indicated by ally of the rim 3., and as the jack is continued 90 the dottedrim 3 in 2. This rim is placed in its operation the tire will be finally freed upon the table with the removal ring side from the rim. It is preferred to either uppermost so that the tire indicated at 4 the table or the bracketand in the drawings may be shifted axially in an upward direc- I have shown the latter fixed and the table tion during the removal operation. The rim rotatably mounted to provide for therela- 97 is securely held on the table by a plurality tive rotary movement between the table and of hooks 5 engaging over the rim, these the jack, the latter term being used broadly hooks being ca *ried by their shank members to include any means or device for exerting 6 which in turn are pivotally connected to the pressure on the tire in a direction parallel to table 2. The said hooks are preferably slidthe axis of the table. 100

T o accommodate larger size rims the table is made expansible as by radially adjustable parts in the form of supporting bars or spokes 23. These supporting members are mounted to slide within radial pockets or chambers 24 formed in the table and opening through the periphery thereof, and by adjusting the supporting members outwardly there is provided an annular series of supports on Which the larger sized rims are seated. Means are provided for retracting and projecting the supporting bars 28 in unison, such as a disc 25 rotatable about the axis of the table and hav ing a series of cam slots 26 for receiving upstanding lugs or pins 27 on the inner ends of the bars whereby upon rotating the disc 25, as by its handle 28, the lugs 27 Will be cammed against to simultaneously project or retract the several supporting bars, in accord with the direction of rotation of the disc.

The hook carrying shanks 6 may also be concurrently adjusted if desired, and to this end these shanks have been illustrated as being carried by the supporting bars, suitable slots 29 and 30 being provided in the upper Wall of each guideway or pocket 24 to respectively accommodate the shanks 6 and the lugs 27.

In providing for the accommodation of different sized rims, provision is also made for adjustability in the mounting of the jack 10 whereby the point of application of the tire removing pressure may be correspondingly selected. ably mounting the jack is shown herein as consisting of a channel or guideway 31 in the upper face of the arm 9 to receive and over hang the flanged base 32 of the jack, as is most clearly depicted in Fig. 3, and by means of this mounting the jack may be slid inwardly or outwardly to best locate the jack for the tire being operated upon.

The annular rack or gear 1.6 may be of any diameter but by giving it a maximum diameter as herein depicted there will be a minimum power requirement to rotate the table.

Vhat is claimed is:

A tire removing machine comprising a standard a table thereon, a bracket thereon having a pair of arms, said table having radial guideWays, supporting members slidablv mounted in said guideways, means for radially adjusting the supporting member simultaneouslv said bracket having a channeled guideway in one of its arms, a removable jack having a flanged base slidably interlocked in the bracket guideway and having a part movable across the periphery of the table for exerting a tire shifting pressure on the tire supported by the table, and means on the other bracket arm for providing relative rotary movement between the table and bracket.

GERRIT VAN DAAM.

A simple manner of adjust-- 

